<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <div v-html="msg"></div>
    <!-- <div>{{msg}}</div> -->
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        msg: `<a href="http://www.baidu.com">百度</a></br>
        <h3>lili</h3>`
      }
    })
  </script>

</body>

</html>